[go: up one dir, main page]

EP1560633A2 - Membrane filter press - Google Patents

Membrane filter press

Info

Publication number
EP1560633A2
EP1560633A2 EP03775286A EP03775286A EP1560633A2 EP 1560633 A2 EP1560633 A2 EP 1560633A2 EP 03775286 A EP03775286 A EP 03775286A EP 03775286 A EP03775286 A EP 03775286A EP 1560633 A2 EP1560633 A2 EP 1560633A2
Authority
EP
European Patent Office
Prior art keywords
membrane
groove
membrane filter
filter press
press according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03775286A
Other languages
German (de)
French (fr)
Other versions
EP1560633B1 (en
Inventor
Bernhard Salbaum
Ulrich Knye
Manfred P. Hermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JV Kunststoffwerk GmbH
Original Assignee
JV Kunststoffwerk GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JV Kunststoffwerk GmbH filed Critical JV Kunststoffwerk GmbH
Publication of EP1560633A2 publication Critical patent/EP1560633A2/en
Application granted granted Critical
Publication of EP1560633B1 publication Critical patent/EP1560633B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/21—Plate and frame presses
    • B01D25/215—Construction of the filter plates, frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
    • B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
    • B01D25/285—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying by compression using inflatable membranes

Definitions

  • the invention relates to a membrane filter press which, in a known manner, comprises a plurality of membrane filter plates and membrane-free filter plates arranged between them.
  • the filter plates are clamped between a head piece and an end piece and are designed in such a way that a filter space is arranged between them.
  • the surfaces of the filter plates that delimit the filter space are equipped with knobs or grooves and are covered with a filter cloth.
  • the nubbed or grooved surface of the membrane filter plates is formed by a flexible or elastically deformable membrane made of rubber or plastic. The back of the membrane can be acted upon by a pressure medium to remove the residual moisture of a filter cake formed in the filter chamber during filtration.
  • a membrane filter press having the features of claim 1.
  • a membrane filter press which comprises at least one membrane filter plate, a base plate with a thickened edge area, a membrane made of an elastically deformable material and a filter cloth, the membrane having an annular bead lying in a complementarily designed groove in the base plate.
  • a sealing groove is embedded in the base plate, which ends at both ends in the manner of a by-pass.
  • a complementary sealing projection which is molded onto the annular bead, engages in the sealing groove on. The fact that the membrane lies with a sealing projection in the said sealing groove prevents the membrane from being lifted off the base plate as a result of the membrane being pressurized from the rear.
  • the pressure medium cannot flow out at the joint between the inside of the membrane and the base plate via the filtrate drain hole, but remains safely in the pressure chamber. This prevents a reduction in the pressure on the membrane.
  • the required pressing pressure can be built up safely.
  • the sealing of the pressure chamber prevents contamination of the filtrate with press medium.
  • the groove and the sealing groove there is at least one filtrate drain hole in the base plate, which is connected to a hole penetrating the membrane, which also serves to remove the filtrate. This ensures a safe filtrate drain. At the same time, this measure creates a seal in the filtrate drain hole.
  • the membrane has an edge-shaped, substantially dovetail-shaped annular bead, which lies in a complementarily designed groove arranged in the base plate.
  • the dovetail shape ensures a particularly secure seal.
  • the fixation of the filter cloth is also problematic in the case of a drip-tight design. It is known, for example, to guide the filter cloth to the outside between two adjacent filter plates, where it serves as a seal for the parting line present between the filter plates.
  • the two filter cloths assigned to a filter plate are often connected to one another by their edges lying outside the filter plates by means of loops or Velcro fasteners.
  • Such a configuration is disadvantageous not only because of the lack of drip-tightness, but also in terms of hygiene. This is because microorganisms can get into the filter press via the filter cloths.
  • the filter cloth is attached to the edge region of the membrane filter plate that adjoins the membrane to the outside. This has the disadvantage, among other things, that due to the necessary Space requirements the filtration area of the filter plate is reduced. In addition, this type of cloth attachment requires increased assembly effort.
  • a membrane is proposed in a particularly advantageous embodiment of the invention according to claim 4, in the annular bead of which a fixing groove is arranged, in which a fixing strip lies.
  • the edge of the filter cloth is attached directly or indirectly to this fixing strip.
  • the membrane and the filter cloth are attached in this way, which reduces the number of parts required for fixing. This also facilitates assembly and disassembly.
  • this type of cloth fixing does not require any space in the edge of the panel. Therefore, a larger membrane with a correspondingly larger filtration area can be used and the filtration capacity can be increased. The penetration of hygienically questionable germs through the filter cloth is prevented. Through this cloth fastening, the membrane filter plate is improved, in particular with regard to the number of parts and the assembly and disassembly effort.
  • a form-fit between the fixing groove and the fixing strip, which is effective transversely to the plane of the base plate, is expedient because this ensures a particularly reliable cloth fixation, which is particularly effective even when the filter press is open.
  • a hermetic seal that prevents the ingress of microorganisms is achieved.
  • the annular bead of the membrane is wedged in the dovetail-shaped groove of the base plate and the clamping effect of the fixing strip holding the filter cloth is increased.
  • there is a seal in the fixing area to prevent the penetration of microorganisms, which is inevitable especially when a filter press is used for the production of food, pharmaceutical products or toxic substances.
  • the fixing area in question is preferably designed such that the fixing strip and the filter cloth in the area of the membrane bead do not protrude beyond the plane plane spanned by the edge area of the base plate. This ensures that filter cloth and Fixing strip do not hinder the mutual contact of filter plates with their edge area, so that a mutual hermetic sealing of the filter plates, for example by interposing a sealing ring, is possible in a simple manner.
  • the filter press is sealed to the outside in the area of the edge area of the filter plates.
  • the membrane bead is now provided with a sealing lip which surrounds the fixing groove, that is to say lies radially outside the fixing groove, and which protrudes beyond the plane plane spanned by the base plate edge region (claim 9).
  • the sealing lip can therefore cooperate with a counter plate in the sense of a hermetic seal. Additional constructive measures such as the introduction of a sealing groove in the filter plate and the insertion of a sealing cord can therefore be dispensed with.
  • the ring bead of the membrane therefore has a triple function: it serves to fasten the membrane and at the same time the filter cloth and also ensures that the filter chamber and the space behind the membranes are sealed off from the outside.
  • the number of parts required for a membrane filter plate is reduced again.
  • the manufacturing effort and the effort for the assembly and disassembly of the filter cloth and the membrane are correspondingly low.
  • Claims 10 to 13 relate to further exemplary embodiments of the invention with different possibilities for fixing the filter cloth.
  • FIG. 1 shows a top view of the corner area of a membrane filter plate with the membrane removed
  • FIG. 2 shows a cross section corresponding to line II-II in FIG. 1
  • Fig. 3 is a cross-sectional view corresponding to FIG. 2, the corner area of a
  • FIG. 4 shows the detail IV from FIG. 3, FIG. 5 the detail V from FIG. 3, FIG. 6 the detail VI from FIG. 3 and
  • Fig. 7 is a plan view of a differently designed membrane plate with a membrane attached.
  • a filter press of the type in question essentially consists of a plurality of membrane filter plates 1 and membrane-free intermediate plates 2 arranged between two membrane filter plates.
  • a membrane filter plate 1 comprises a base plate 3 with a thickened edge area 4, a membrane 6 fixed to the base plate 3 and having knobs 5 on its outside, and a filter cloth 7.
  • the intermediate plates 2 also have an egg - A thickened edge area 4a.
  • the plates mentioned are clamped between a head piece and an end piece (not shown), their edge regions 4, 4a abutting one another.
  • the plate areas adjoining the edge area 4, 4 a radially inwards are drawn in, so that a filter space 11 (FIG.
  • a dovetail-shaped receiving recess or groove 8 is arranged in the edge region 4 thereof in cross section.
  • the groove 8 extends in the circumferential direction over the entire edge region, that is to say it is annular.
  • the membrane 6 has an annular bead 9 on the edge, which has a cross-sectional shape which essentially corresponds to the groove 8 and which lies in the groove 8 in a form-fitting manner.
  • the membrane 6 is inserted into the groove 8 with elastic deformation of the membrane 6, which consists of a rubber-like or of an elastic plastic. The restoring forces caused thereby cause a force fit between the annular bead 9 and the groove 8.
  • a fixing groove 10 is embedded in the annular bead 9, which extends towards the bottom of the groove. This expansion can be such that the groove walls 12 initially run parallel to one another and then merge into a section 13 which is approximately circular in cross section.
  • a fixing strip 14 which has a cross-sectional shape corresponding to the groove cross section. The cross-sectional dimensions of the fixing strip are such that they lie in the fixing groove 10 with an elastic expansion of the annular bead 9. In this way, the strength of the connection between the membrane 6 and the base plate 3 on the one hand and between the fixing bar 14 and the fixing groove 10 on the other hand is increased.
  • the filter cloth 7 is fixed on the fixing strip 14, so that the strength of the connection between the filter cloth 7 and the membrane 6 is also increased in the manner described.
  • the fixing bar 14 essentially fills the fixing groove 10 completely, thereby avoiding gaps or dead spaces which harbor the risk of dirt and microorganisms accumulating.
  • the filter cloth 7 and the fixing strip 14 are arranged in such a way that they initially do not protrude in the closed state of the filter press beyond the plane plane 15 spanned by the edge area 4 of the base plate. This ensures that only the edge area 4 takes over the mutual flat contact of the filter plates and any sealing function that may be necessary there.
  • the sealing function between the adjacent filter plates is taken over by the annular bead 9, so that additional sealing measures, i. H. So grooves in the edge area and corresponding sealing rings can be dispensed with.
  • the radially outer wall 16 of the annular bead 9 is extended to form a sealing lip 17 which projects beyond the plane plane 15. In the operating state, the sealing lip 17 is in contact with the edge region of a counter plate, for example an intermediate plate 2, and forms a structurally simple and effective seal for the membrane filter press.
  • the filter cloth 7 can be fixed to the fixing bar 14 in different ways.
  • the connection between filter cloth 7 and adhesive surface 18 can also be made by welding, for example if both parts are made of plastics that can be welded to one another.
  • the filter cloth 7 is inserted between the fixing bar 14 and the wall of the fixing groove 10.
  • the fixing bar 14 is dimensioned such that the annular bead 9 is widened radially and accordingly Chend both the filter cloth 7 and the fixing bar 14 are clamped in the fixing groove by the restoring forces of the annular bead material.
  • the top 19 of the fixing bar 14 is arranged in the plane 15.
  • the edge surface 20 of the filter cloth 7 lying in the fixing groove 10 is also flush with the plane plane 15. In this way, a relatively flat and essentially free of gaps flat arrangement is created in the region of the annular bead 9.
  • the membrane 6 has a plurality of bores 22 which are arranged near the annular bead 9 and which are aligned with a fluid drainage bore 23 which penetrates the base plate 3 transversely or are in fluidic connection.
  • the filtrate drain hole 23 is in turn connected via a connecting hole 24 to a filtrate channel 25 arranged in the corner region of the base plate 3 (FIGS. 1 and 2).
  • the filtrate that collects between the filter cloth 7 and the membrane 6 or between its knobs 5 can therefore flow away in the direction of the arrow 26 through the bores mentioned.
  • sealing grooves 29, 29a In order to ensure a sealing of the pressure space 27 between the membrane 6 and the base plate region 28 drawn inwards and pressurizable for pressing out a filter cake against the filtrate drain hole, two sealing grooves 29, 29a with a dovetail cross-section are embedded in the edge region of the base plate 3.
  • the sealing grooves 29, 29a are arranged in an inner region of the base plate 3 which is delimited by the groove 8.
  • the sealing grooves each open at both ends in the manner of a by-pass into the groove 8.
  • a sealing projection 30 of complementary design, integrally formed on the annular bead 9, and preferably under elastic prestress. The described configuration prevents the membrane from lifting off from the base plate surface in the direction of arrow 32 (FIGS.
  • the edge region of the base plate 3 surrounding the filtrate drain channel 25 has an annular groove 33 with a dovetail cross section, in which a sealing ring 34 for sealing the filtrate drain channel 25 lies.
  • the intermediate plate 2 there are recessed grooves 35 on both sides, similar to the fixing groove 10 of the membrane filter plates 1, in which essentially circular clamping strips 36 lie in cross-section with the interposition of the filter cloth 7a.
  • the end of the filter cloth 7a is sewn into a hemstitch 37, which includes the clamping strip 36.
  • a hemstitch 37 which includes the clamping strip 36.
  • the depth of the groove 35, the cross-sectional dimensions of the clamping strip 36 and the thickness of the filter cloth 7a are dimensioned such that the outside 38 of the filter cloth is flush with the plane plane 15a spanned by the edge region 4a or does not essentially protrude beyond it.
  • the double layer 39 of the filter cloth 7a required to form the hemstitch 37 is arranged in the region of the groove 35.
  • Border area a Border area
  • Plan level a Plan level

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Polarising Elements (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention relates to a membrane filter press. On operation of such a press a secure generation of the necessary pressing pressure can be guaranteed with a membrane filter press comprising at least one membrane filter plate, a baseplate with thickened edge region, a membrane made from an elastically-deformable material and a filter cloth, whereby the membrane comprises an annular edge beading which lies in a complementary groove on the baseplate. A sealing groove is also let into the baseplate which opens out into the groove at both ends in the manner of a bypass. A complementary sealing projection, moulded on the annular beading, engages in the sealing groove with formation of a seal. The cavity enclosed between the groove and the sealing groove is preferably provided with at least one filtrate drain drilling.

Description

Beschreibung description
MembranfilterpresseMembrane Filter Press
Die Erfindung betrifft eine Membranfilterpresse, die in bekannter Weise mehrere Membranfilterplatten und dazwischen angeordnete membranfreie Filterplatten umfasst. Die Filterplatten sind im Betriebszustand zwischen einem Kopf- und einem Endstück eingespannt und sind so ausgestaltet, dass zwischen ihnen ein Filterraum angeordnet ist. Die den Filterraum begrenzenden Flächen der Filterplatten sind mit Noppen oder Rillen ausgestattet und sind mit einem Filtertuch belegt. Die genoppte oder gerillte Oberfläche wird bei den Membranfilterplatten durch eine flexible bzw. elastisch verformbare Membran aus Gummi oder Kunststoff gebildet. Die Rückseite der Membran ist zur Entfernung der Restfeuchtigkeit eines bei der Filtration im Filterraum gebildeten Filterkuchens mit einem Druckmedium beaufschlagbar.The invention relates to a membrane filter press which, in a known manner, comprises a plurality of membrane filter plates and membrane-free filter plates arranged between them. In the operating state, the filter plates are clamped between a head piece and an end piece and are designed in such a way that a filter space is arranged between them. The surfaces of the filter plates that delimit the filter space are equipped with knobs or grooves and are covered with a filter cloth. The nubbed or grooved surface of the membrane filter plates is formed by a flexible or elastically deformable membrane made of rubber or plastic. The back of the membrane can be acted upon by a pressure medium to remove the residual moisture of a filter cake formed in the filter chamber during filtration.
Bei der Druckbeaufschlagung der Membranrückseite mit einem Druckmedium kann es beispielsweise aufgrund eines durch Materialermüdung undichten Druckraumes zu einem ungenügenden Pressdruckaufbau kommen. Kann Druckmedium aus dem Druckraum entweichen, ist eine effektive Druckfiltration aufgrund des geringeren Pressdruk- kes nicht mehr möglich. Zudem kann dies zu einer Verunreinigung des Filtrats durch das Druckmedium führen.When pressure is applied to the back of the membrane with a pressure medium, an insufficient pressure build-up can occur, for example, due to a pressure chamber leaking due to material fatigue. If pressure medium can escape from the pressure chamber, effective pressure filtration is no longer possible due to the lower pressure. In addition, this can lead to contamination of the filtrate by the pressure medium.
Davon ausgehend ist es die Aufgabe der Erfindung, bei einer Membranfilterpresse einen sicheren Aufbau des erforderlichen Pressdruckes zu gewährleisten.Based on this, it is the object of the invention to ensure a safe build-up of the required pressing pressure in a membrane filter press.
Diese Aufgabe wird durch eine Membranfilterpresse mit den Merkmalen des Anspruches 1 gelöst. Danach wird eine Membranfilterpresse vorgeschlagen, die wenigstens eine Membranfilterplatte, eine Grundplatte mit verdicktem Randbereich, eine Membran aus einem elastisch verformbaren Material und ein Filtertuch umfasst, wobei die Mem- bran einen randständigen, in einer komplementär gestalteten Nut der Grundplatte einliegenden Ringwulst aufweist. Gleichzeitig ist in der Grundplatte eine Dichtnut eingelassen, die nach Art eines By-passes beidendig in die Nut mündet. In die Dichtnut greift ein komplementär gestalteter, an den Ringwulst angeformter Dichtvorsprung dichtend ein. Dadurch, dass die Membran mit einem Dichtvorsprung in der genannten Dichtnut einliegt, ist ein durch rückseitige Druckbeaufschlagung der Membran bedingtes Abheben der Membran von der Grundplatte verhindert. Das Druckmedium kann nicht an der Trennfuge zwischen der Membraninnenseite und der Grundplatte über die Filtratab- laufbohrung abfließen, sondern verbleibt sicher im Druckraum. Dadurch wird eine Verminderung des Pressdruckes auf die Membran ausgeschlossen. Der erforderliche Pressdruck kann sicher aufgebaut werden. Gleichzeitig wird durch das Abdichten des Druckraumes eine Verunreinigung des Filtrats mit Pressmedium verhindert.This object is achieved by a membrane filter press having the features of claim 1. Thereafter, a membrane filter press is proposed which comprises at least one membrane filter plate, a base plate with a thickened edge area, a membrane made of an elastically deformable material and a filter cloth, the membrane having an annular bead lying in a complementarily designed groove in the base plate. At the same time, a sealing groove is embedded in the base plate, which ends at both ends in the manner of a by-pass. A complementary sealing projection, which is molded onto the annular bead, engages in the sealing groove on. The fact that the membrane lies with a sealing projection in the said sealing groove prevents the membrane from being lifted off the base plate as a result of the membrane being pressurized from the rear. The pressure medium cannot flow out at the joint between the inside of the membrane and the base plate via the filtrate drain hole, but remains safely in the pressure chamber. This prevents a reduction in the pressure on the membrane. The required pressing pressure can be built up safely. At the same time, the sealing of the pressure chamber prevents contamination of the filtrate with press medium.
In einer Ausführungsform der Erfindung nach Anspruch 2 ist zwischen der Nut und der Dichtnut wenigstens eine Filtratablaufbohrung in der Grundplatte vorhanden, die mit einer die Membran durchsetzenden Bohrung, die ebenfalls der Filtratabführung dient, in Verbindung steht. Damit wird ein sicherer Filtratablauf gewährleistet. Zugleich wird durch diese Maßnahme eine Abdichtung der Filtratablaufbohrung geschaffen.In one embodiment of the invention according to claim 2, between the groove and the sealing groove there is at least one filtrate drain hole in the base plate, which is connected to a hole penetrating the membrane, which also serves to remove the filtrate. This ensures a safe filtrate drain. At the same time, this measure creates a seal in the filtrate drain hole.
Nach der Lehre des Anspruchs 3 weist die Membran einen randständigen, im Wesentlichen im Querschnitt schwalbenschwanzförmigen Ringwulst auf, der in einer komplementär gestalteten, in der Grundplatte angeordneten Nut einliegt. Gleiches gilt für das Zusammenspiel von Dichtvorsprung und Dichtnut. Durch die Schwalbenschwanzform wird eine besonders sichere Abdichtung erreicht.According to the teaching of claim 3, the membrane has an edge-shaped, substantially dovetail-shaped annular bead, which lies in a complementarily designed groove arranged in the base plate. The same applies to the interaction of the sealing projection and sealing groove. The dovetail shape ensures a particularly secure seal.
Bei Filterpressen der genannten Art ist zudem die Fixierung des Filtertuchs bei tropfdichter Ausführung problematisch. Bekannt ist es beispielsweise, das Filtertuch zwischen zwei aneinanderliegenden Filterplatten nach außen zu führen, wobei es als Ab- dichtung der zwischen den Filterplatten vorhandenen Trennfuge dient. Oft sind die zwei einer Filterplatte zugeordneten Filtertücher mit ihren außerhalb der Filterplatten liegenden Rändern durch Schlaufen oder Klettverschluß miteinander verbunden. Eine solche Ausgestaltung ist nicht nur wegen der fehlenden Tropfdichtigkeit, sondern auch in hy-*- — gienischer Hinsicht ungünstig. Über die Filtertücher können nämlich Mikroorganismen in die Filterpresse gelangen. Bei anderen Pressenausführungen ist das Filtertuch an dem sich an die Membran nach außen anschließenden Randbereich der Membranfilterplatte befestigt. Dies hat u.a. den Nachteil, dass aufgrund des dafür erforderlichen Platzbedarfes die Filtrationsfläche der Filterplatte verringert ist. Außerdem erfordert diese Art der Tuchbefestigung einen erhöhten Montageaufwand.With filter presses of the type mentioned, the fixation of the filter cloth is also problematic in the case of a drip-tight design. It is known, for example, to guide the filter cloth to the outside between two adjacent filter plates, where it serves as a seal for the parting line present between the filter plates. The two filter cloths assigned to a filter plate are often connected to one another by their edges lying outside the filter plates by means of loops or Velcro fasteners. Such a configuration is disadvantageous not only because of the lack of drip-tightness, but also in terms of hygiene. This is because microorganisms can get into the filter press via the filter cloths. In other press designs, the filter cloth is attached to the edge region of the membrane filter plate that adjoins the membrane to the outside. This has the disadvantage, among other things, that due to the necessary Space requirements the filtration area of the filter plate is reduced. In addition, this type of cloth attachment requires increased assembly effort.
Aus diesem Grund wird in einer besonders vorteilhaften Ausführungsform der Erfindung nach Anspruch 4 eine Membran vorgeschlagen, in deren Ringwulst eine Fixiernut angeordnet ist, in der eine Fixierleiste einliegt. Das Filtertuch ist dabei mit seinem Randbereich mittel- oder unmittelbar an dieser Fixierleiste befestigt. Die Befestigung der Membran und des Filtertuchs sind auf diese Weise miteinander verknüpft, was die zur Fixierung notwendige Teileanzahl reduziert. Damit ist aber auch eine Montage- bzw. Demontageerleichterung verbunden. Außerdem erfordert diese Art der Tuchfixierung keinen Platzbedarf im Plattenrandbereich. Daher kann eine größere Membran mit entsprechend größerer Filtrationsnutzfläche eingesetzt und die Filtrationsleistung erhöht werden. Ein Eindringen hygienisch bedenklicher Keime über das Filtertuch ist verhindert. Durch diese Tuchbefestigung wird die Membranfilterplatte insbesondere hinsicht- lieh der Teileanzahl und des Montage- bzw. Demontageaufwandes verbessert.For this reason, a membrane is proposed in a particularly advantageous embodiment of the invention according to claim 4, in the annular bead of which a fixing groove is arranged, in which a fixing strip lies. The edge of the filter cloth is attached directly or indirectly to this fixing strip. The membrane and the filter cloth are attached in this way, which reduces the number of parts required for fixing. This also facilitates assembly and disassembly. In addition, this type of cloth fixing does not require any space in the edge of the panel. Therefore, a larger membrane with a correspondingly larger filtration area can be used and the filtration capacity can be increased. The penetration of hygienically questionable germs through the filter cloth is prevented. Through this cloth fastening, the membrane filter plate is improved, in particular with regard to the number of parts and the assembly and disassembly effort.
Zweckmäßig ist ein quer zur Planebene der Grundplatte wirksamer Formschluss zwischen Fixiernut und Fixierleiste (Anspruch 5), weil dadurch eine besonders zuverlässige, insbesondere auch im geöffneten Zustand der Filterpresse wirksame Tuchfixierung gewährleistet ist. In diesem Sinne wirkt auch ein Kraftschluss zwischen den genannten Teilen, etwa durch Rückstellkräfte infolge einer Aufweitung der Fixiernut durch die Fixierleiste (Anspruch 6). Auf diese Weise wird auch eine hermetische, das Eindringen von Mikroorganismen verhindernde Abdichtung erreicht. Darüber hinaus wird der Ringwulst der Membran in der schwalbenschwanzförmigen Nut der Grundplatte verkeilt und die Klemmwirkung der das Filtertuch haltenden Fixierleiste erhöht. Gleichzeitig erfolgt im Fixierbereich eine das Eindringen von Mikroorganismen verhindernde Abdichtung, die insbesondere dann unumgänglich ist, wenn eine Filterpresse zur Herstellung von Lebensmitteln, pharmazeutischen Produkten oder toxischen Stoffen eingesetzt wird.A form-fit between the fixing groove and the fixing strip, which is effective transversely to the plane of the base plate, is expedient because this ensures a particularly reliable cloth fixation, which is particularly effective even when the filter press is open. In this sense, there is also a frictional connection between the parts mentioned, for example by restoring forces as a result of an expansion of the fixing groove by the fixing strip (claim 6). In this way, a hermetic seal that prevents the ingress of microorganisms is achieved. In addition, the annular bead of the membrane is wedged in the dovetail-shaped groove of the base plate and the clamping effect of the fixing strip holding the filter cloth is increased. At the same time there is a seal in the fixing area to prevent the penetration of microorganisms, which is inevitable especially when a filter press is used for the production of food, pharmaceutical products or toxic substances.
Der in Rede stehende Fixierbereich ist in einem weiteren Ausführungsbeispiel der Erfindung nach Anspruch 7 vorzugsweise so ausgestaltet, dass die Fixierleiste und das Filtertuch im Bereich des Membranwulstes die vom Randbereich der Grundplatte aufgespannte Planebene nicht überragen. Dadurch ist gewährleistet, dass Filtertuch und Fixierleiste die gegenseitige Anlage von Filterplatten mit ihrem Randbereich nicht behindern, so dass eine gegenseitige hermetische Abdichtung der Filterplatten, etwa durch Zwischenlage eines Dichtringes, auf einfache Weise möglich ist.In a further exemplary embodiment of the invention, the fixing area in question is preferably designed such that the fixing strip and the filter cloth in the area of the membrane bead do not protrude beyond the plane plane spanned by the edge area of the base plate. This ensures that filter cloth and Fixing strip do not hinder the mutual contact of filter plates with their edge area, so that a mutual hermetic sealing of the filter plates, for example by interposing a sealing ring, is possible in a simple manner.
Die bei dem in Anspruch 8 gelehrten Ausführungsbeispiel gezeigte Maßnahme, dass die Fixierleiste die Fixiernut im Wesentlichen vollständig ausfüllt, zielt daraufhin ab, mit Mikroorganismen kontaminierbare Spalträume zu vermeiden.The measure shown in the exemplary embodiment taught in claim 8 that the fixing bar essentially completely fills the fixing groove aims at avoiding gap spaces which can be contaminated with microorganisms.
Wie bereits oben erwähnt, findet die Abdichtung der Filterpresse nach außen im Be- reich des Randbereiches der Filterplatten statt. Vorzugsweise ist nun die Membranwulst mit einer die Fixiernut umfassenden, also radial außerhalb der Fixiernut liegenden Dichtlippe versehen, die über die von dem Grundplattenrandbereich aufgespannte Planebene hinaussteht (Anspruch 9). Die Dichtlippe kann daher mit einer Gegenplatte im Sinne einer hermetischen Abdichtung zusammenwirken. Auf zusätzliche konstruktive Maßnahmen wie das Einbringen einer Dichtnut in die Filterplatte und das Einlegen einer Dichtschnur kann daher verzichtet werden. Der Ringwulst der Membran hat somit eine Dreifachfunktion: Er dient der Befestigung der Membran und gleichzeitig des Filtertuchs und gewährleistet darüber hinaus eine Abdichtung der Filterkammer und des Raumes hinter den Membranen nach außen. Die für eine Membranfilterplatte notwen- dige Teilezahl ist dadurch nochmals reduziert. Dementsprechend gering ist der Herstellungsaufwand und der Aufwand für die Montage- und Demontage des Filtertuchs und der Membran.As already mentioned above, the filter press is sealed to the outside in the area of the edge area of the filter plates. Preferably, the membrane bead is now provided with a sealing lip which surrounds the fixing groove, that is to say lies radially outside the fixing groove, and which protrudes beyond the plane plane spanned by the base plate edge region (claim 9). The sealing lip can therefore cooperate with a counter plate in the sense of a hermetic seal. Additional constructive measures such as the introduction of a sealing groove in the filter plate and the insertion of a sealing cord can therefore be dispensed with. The ring bead of the membrane therefore has a triple function: it serves to fasten the membrane and at the same time the filter cloth and also ensures that the filter chamber and the space behind the membranes are sealed off from the outside. The number of parts required for a membrane filter plate is reduced again. The manufacturing effort and the effort for the assembly and disassembly of the filter cloth and the membrane are correspondingly low.
Die Ansprüche 10 bis 13 betreffen weitere Ausführungsbeispiele der Erfindung mit ver- schiedenen Möglichkeiten der Fixierung des Filtertuches.Claims 10 to 13 relate to further exemplary embodiments of the invention with different possibilities for fixing the filter cloth.
Die Erfindung wird nun anhand von in den beigefügten Zeichnungen dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:The invention will now be explained in more detail with reference to exemplary embodiments shown in the accompanying drawings. Show it:
Fig. 1 die Draufsicht auf den Eckbereich einer Membranfilterplatte mit abgenommener Membrane, Fig. 2 einen Querschnitt entsprechend Linie ll-ll in Fig. 1 , Fig. 3 eine Querschnittsdarstellung entsprechend Fig. 2, die den Eckbereich einer1 shows a top view of the corner area of a membrane filter plate with the membrane removed, FIG. 2 shows a cross section corresponding to line II-II in FIG. 1, Fig. 3 is a cross-sectional view corresponding to FIG. 2, the corner area of a
Membranplatte und einer membranlosen Zwischenplatte zeigt, Fig. 4 das Detail IV aus Fig. 3, Fig. 5 das Detail V aus Fig. 3, Fig. 6 den Ausschnitt VI aus Fig. 3 und4 shows the detail IV from FIG. 3, FIG. 5 the detail V from FIG. 3, FIG. 6 the detail VI from FIG. 3 and
Fig. 7 die Draufsicht auf eine anders gestaltete Membranplatte mit daran befestigter Membran.Fig. 7 is a plan view of a differently designed membrane plate with a membrane attached.
Eine Filterpresse der in Rede stehenden Art setzt sich im Wesentlichen aus mehreren Membranfilterplatten 1 und jeweils zwischen zwei Membranfilterplatten angeordneten membranlosen Zwischenplatten 2 zusammen. Wie insbesondere aus Fig. 1 - 3 ersichtlich ist, umfasst eine Membranfilterplatte 1 eine Grundplatte 3 mit einem verdickten Randbereich 4, eine an der Grundplatte 3 fixierte, auf ihrer Außenseite Noppen 5 aufweisende Membran 6 und ein Filtertuch 7. Die Zwischenplatten 2 weisen ebenfalls ei- nen verdickten Randbereich 4a auf. Die genannten Platten sind im Betriebszustand zwischen ein Kopf- und ein Endstück (nicht dargestellt) eingespannt, wobei sie mit ihren Randbereichen 4, 4a aneinanderliegen. Die sich an den Randbereich 4,4a radial nach innen anschließenden Plattenbereiche sind nach innen eingezogen, so dass sich zwischen zwei miteinander zusammenwirkenden Platten ein Filterraum 11 (Fig. 3) bildet. Zur Fixierung der Membran 6 an der Grundplatte 3 ist eine im Querschnitt schwalben- schwanzförmige Aufnahmeausnehmung bzw. Nut 8 in deren Randbereich 4 angeordnet. Die Nut 8 erstreckt sich in Umfangsrichtung über den gesamten Randbereich, ist also ringförmig ausgebildet. Die Membran 6 weist einen randständigen Ringwulst 9 auf, der eine der Nut 8 im Wesentlichen entsprechende Querschnittsform hat und der in der Nut 8 formschlüssig einliegt. Das Einsetzen der Membran 6 in die Nut 8 erfolgt dabei unter elastischer Verformung der aus einem gummiähnlichen oder aus einem elastischen Kunststoff bestehenden Membran 6. Die dadurch hervorgerufenen Rückstellkräfte bewirken einen Kraftschluss zwischen Ringwulst 9 und Nut 8.A filter press of the type in question essentially consists of a plurality of membrane filter plates 1 and membrane-free intermediate plates 2 arranged between two membrane filter plates. As can be seen in particular from FIGS. 1-3, a membrane filter plate 1 comprises a base plate 3 with a thickened edge area 4, a membrane 6 fixed to the base plate 3 and having knobs 5 on its outside, and a filter cloth 7. The intermediate plates 2 also have an egg - A thickened edge area 4a. In the operating state, the plates mentioned are clamped between a head piece and an end piece (not shown), their edge regions 4, 4a abutting one another. The plate areas adjoining the edge area 4, 4 a radially inwards are drawn in, so that a filter space 11 (FIG. 3) is formed between two plates interacting with one another. To fix the membrane 6 to the base plate 3, a dovetail-shaped receiving recess or groove 8 is arranged in the edge region 4 thereof in cross section. The groove 8 extends in the circumferential direction over the entire edge region, that is to say it is annular. The membrane 6 has an annular bead 9 on the edge, which has a cross-sectional shape which essentially corresponds to the groove 8 and which lies in the groove 8 in a form-fitting manner. The membrane 6 is inserted into the groove 8 with elastic deformation of the membrane 6, which consists of a rubber-like or of an elastic plastic. The restoring forces caused thereby cause a force fit between the annular bead 9 and the groove 8.
Von der die Noppen 5 tragenden Außenseite der Membran 6 her ist in den Ringwulst 9 eine Fixiernut 10 eingelassen, die sich zu Ihrem Nutgrund hin erweitert. Diese Erweiterung kann derart sein, dass die Nutwände 12 zunächst parallel zueinander verlaufen und dann in einen im Querschnitt etwa kreisförmigen Abschnitt 13 übergehen. In der Fixiernut 10 liegt eine Fixierleiste 14 ein, die einen dem Nutquerschnitt entsprechende Querschnittsform aufweist. Die Querschnittsabmessungen der Fixierleiste sind dabei derart, dass sie unter elastischer Aufweitung des Ringwulstes 9 in der Fixiernut 10 einliegen. Auf diese Weise wird die Festigkeit der Verbindung zwischen der Membran 6 und der Grundplatte 3 einerseits und zwischen der Fixierleiste 14 und der Fixiernut 10 andererseits erhöht. An der Fixierleiste 14 ist das Filtertuch 7 fixiert, so dass auf die geschilderte Weise auch die Festigkeit der Verbindung zwischen Filtertuch 7 und Membran 6 erhöht wird. Die Fixierleiste 14 füllt die Fixiernut 10 im Wesentlichen vollständig aus, wodurch Spalte bzw. Toträume vermieden werden, die die Gefahr der Ansamm- lung von Schmutz und Mikroorganismen in sich bergen.From the outside of the membrane 6 carrying the knobs 5, a fixing groove 10 is embedded in the annular bead 9, which extends towards the bottom of the groove. This expansion can be such that the groove walls 12 initially run parallel to one another and then merge into a section 13 which is approximately circular in cross section. In the Fixing groove 10 is a fixing strip 14, which has a cross-sectional shape corresponding to the groove cross section. The cross-sectional dimensions of the fixing strip are such that they lie in the fixing groove 10 with an elastic expansion of the annular bead 9. In this way, the strength of the connection between the membrane 6 and the base plate 3 on the one hand and between the fixing bar 14 and the fixing groove 10 on the other hand is increased. The filter cloth 7 is fixed on the fixing strip 14, so that the strength of the connection between the filter cloth 7 and the membrane 6 is also increased in the manner described. The fixing bar 14 essentially fills the fixing groove 10 completely, thereby avoiding gaps or dead spaces which harbor the risk of dirt and microorganisms accumulating.
Das Filtertuch 7 und die Fixierleiste 14 sind so angeordnet, dass sie zunächst im geschlossenen Zustand der Filterpresse über die vom Randbereich 4 der Grundplatte aufgespannte Planebene 15 nicht hinausragen. Dadurch ist gewährleistet, dass allein der Randbereich 4 die gegenseitige Plananlage der Filterplatten und eine evtl. dort notwendige Abdichtungsfunktion übernimmt. Die Abdichtungsfunktion zwischen den aneinanderliegenden Filterplatten wird durch den Ringwulst 9 übernommen, so dass auf zusätzliche Abdichtungsmaßnahmen, d. h. also Nuten im Randbereich und entsprechende Dichtungsringe verzichtet werden kann. Dazu ist die radial außenliegende Wand 16 des Ringwulstes 9 zu einer Dichtlippe 17 verlängert, die die Planebene 15 überragt. Im Betriebszustand steht die Dichtlippe 17 an dem Randbereich einer Gegenplatte, etwa einer Zwischenplatte 2 an und bildet eine konstruktiv einfache und wirkungsvolle Abdichtung der Membranfilterpresse.The filter cloth 7 and the fixing strip 14 are arranged in such a way that they initially do not protrude in the closed state of the filter press beyond the plane plane 15 spanned by the edge area 4 of the base plate. This ensures that only the edge area 4 takes over the mutual flat contact of the filter plates and any sealing function that may be necessary there. The sealing function between the adjacent filter plates is taken over by the annular bead 9, so that additional sealing measures, i. H. So grooves in the edge area and corresponding sealing rings can be dispensed with. For this purpose, the radially outer wall 16 of the annular bead 9 is extended to form a sealing lip 17 which projects beyond the plane plane 15. In the operating state, the sealing lip 17 is in contact with the edge region of a counter plate, for example an intermediate plate 2, and forms a structurally simple and effective seal for the membrane filter press.
Das Filtertuch 7 kann auf unterschiedliche Weise an der Fixierleiste 14 fixiert sein. Bei dem Ausführungsbeispiel nach Fig. 4 bildet die die Fixiernut 10 überdeckende Oberseite der unter elastischer Aufweitung in der Fixiernut 10 einliegenden Fixierleiste 14 eine Haftfläche 18, mit der das Filtertuch 7 mit seinem Randbereich verklebt ist. Die Verbindung zwischen Filtertuch 7 und Haftfläche 18 kann aber auch durch eine Ver- schweißung erfolgen, etwa wenn beide Teile aus miteinander verschweißbaren Kunststoffen bestehen. Bei der in Fig. 5 dargestellten Befestigungsart ist das Filtertuch 7 zwischen die Fixierleiste 14 und die Wandung der Fixiernut 10 eingelegt. Die Fixierleiste 14 ist so bemessen, dass der Ringwulst 9 radial aufgeweitet ist und dementspre- chend sowohl das Filtertuch 7 als auch die Fixierleiste 14 durch die Rückstellkräfte des Ringwulstmaterials in der Fixiernut festgeklemmt sind. Weiterhin ist die Oberseite 19 der Fixierleiste 14 in der Planebene 15 angeordnet. Die Kantenfläche 20 des in der Fixiernut 10 einliegenden Filtertuchs 7 schließt ebenfalls bündig mit der Planebene 15 ab. Auf diese Weise wird im Bereich des Ringwulstes 9 eine relativ ebene und im Wesentlichen von Spalten freie flächige Anordnung geschaffen.The filter cloth 7 can be fixed to the fixing bar 14 in different ways. In the exemplary embodiment according to FIG. 4, the upper side of the fixing strip 14, which covers the fixing groove 10 and is located in the fixing groove 10 under elastic expansion, forms an adhesive surface 18, with which the filter cloth 7 is glued with its edge region. However, the connection between filter cloth 7 and adhesive surface 18 can also be made by welding, for example if both parts are made of plastics that can be welded to one another. 5, the filter cloth 7 is inserted between the fixing bar 14 and the wall of the fixing groove 10. The fixing bar 14 is dimensioned such that the annular bead 9 is widened radially and accordingly Chend both the filter cloth 7 and the fixing bar 14 are clamped in the fixing groove by the restoring forces of the annular bead material. Furthermore, the top 19 of the fixing bar 14 is arranged in the plane 15. The edge surface 20 of the filter cloth 7 lying in the fixing groove 10 is also flush with the plane plane 15. In this way, a relatively flat and essentially free of gaps flat arrangement is created in the region of the annular bead 9.
Um einen Filtratablauf zu gewährleisten, weist die Membran 6 mehrere, nahe dem Ringwulst 9 angeordnete Bohrungen 22 auf, die mit einer die Grundplatte 3 quer durch- setzenden Filtratablaufbohrung 23 fluchten bzw. in fluidischer Verbindung stehen. Die Filtratablaufbohrung 23 ihrerseits ist über eine Verbindungsbohrung 24 mit einem im Eckbereich der Grundplatte 3 angeordneten Filtratkanal 25 (Fig. 1 und 2) verbunden. Das sich zwischen dem Filtertuch 7 und der Membran 6 bzw. zwischen dessen Noppen 5 ansammelnde Filtrat kann daher über die genannten Bohrungen in Pfeilrich- tung 26 abfließen. Um eine Abdichtung des zwischen der Membran 6 und dem nach innen eingezogenen Grundplattenbereich 28 vorhandenen und zum Auspressen eines Filterkuchens mit Druck beaufschlagbaren Druckraums 27 gegenüber der Filtratablaufbohrung zu gewährleisten, sind im Randbereich der Grundplatte 3 zwei im Querschnitt schwalbenschwanzförmige Dichtnuten 29, 29a eingelassen. Die Dichtnuten 29, 29a sind dabei in einem von der Nut 8 umgrenzten inneren Bereich der Grundplatte 3 angeordnet. Die Dichtnuten münden jeweils beidendig nach Art eines By-passes in die Nut 8. In den Dichtnuten 29, 29a liegt jeweils ein im Querschnitt komplementär ausgestalteter, an den Ringwulst 9 angeformter Dichtvorsprung 30 formschlüssig und vorzugsweise unter elastischer Vorspannung ein. Durch die geschilderte Ausgestaltung ist verhindert, dass sich die Membran bei Druckbeaufschlagung des Druckraumes 27 von der Grundplattenoberfläche in Pfeilrichtung 32 (Fig. 3 und 4) abhebt, so dass Druckmedium über den zwischen Membran 6 und Grundplatte 3 vorhandenen Spaltraum in die Filtratablaufbohrung 23 gelangen kann, was den Aufbau eines erforderlichen Pressdruckes behindern und außerdem dazu führen würde, dass Druckmedium in das Filtrat gelangt. Bei der in Fig. 7 dargestellten Membranfilterplatte 1a mit daran fixierter Membrane 6 fehlt die eben geschilderte, zusätzliche Abdichtung der Bohrungen 22a. Ein Abheben der Membran im Falle einer rückseitigen Druckbeaufschlagung durch ein Druckmedium ist hier dadurch verhindert, dass sich die Membrane in dem den Bohrun- gen 22a zugeordneten Bereich mit Stütznoppen 31 an einer Gegenplatte, also etwa einer Zwischenplatte 2 abstützt.In order to ensure a filtrate drainage, the membrane 6 has a plurality of bores 22 which are arranged near the annular bead 9 and which are aligned with a fluid drainage bore 23 which penetrates the base plate 3 transversely or are in fluidic connection. The filtrate drain hole 23 is in turn connected via a connecting hole 24 to a filtrate channel 25 arranged in the corner region of the base plate 3 (FIGS. 1 and 2). The filtrate that collects between the filter cloth 7 and the membrane 6 or between its knobs 5 can therefore flow away in the direction of the arrow 26 through the bores mentioned. In order to ensure a sealing of the pressure space 27 between the membrane 6 and the base plate region 28 drawn inwards and pressurizable for pressing out a filter cake against the filtrate drain hole, two sealing grooves 29, 29a with a dovetail cross-section are embedded in the edge region of the base plate 3. The sealing grooves 29, 29a are arranged in an inner region of the base plate 3 which is delimited by the groove 8. The sealing grooves each open at both ends in the manner of a by-pass into the groove 8. In the sealing grooves 29, 29a there is in each case a sealing projection 30 of complementary design, integrally formed on the annular bead 9, and preferably under elastic prestress. The described configuration prevents the membrane from lifting off from the base plate surface in the direction of arrow 32 (FIGS. 3 and 4) when pressure is applied to the pressure chamber 27, so that pressure medium can get into the filtrate drain hole 23 via the gap space between the membrane 6 and the base plate 3 , which would hinder the build-up of a required pressing pressure and would also lead to pressure medium getting into the filtrate. In the membrane filter plate 1a shown in FIG. 7 with the membrane 6 fixed thereon, the above-described additional sealing of the bores 22a is missing. Lifting off the membrane in the event of pressure from the back being prevented by a pressure medium is prevented here by the membrane being in the hole region 22a associated with support knobs 31 on a counter plate, that is to say an intermediate plate 2.
Der den Filtratablaufkanal 25 umgebende Randbereich der Grundplatte 3 weist eine ringförmige, im Querschnitt schwalbenschwanzförmige Nut 33 auf, in der ein Dichtring 34 zur Abdichtung des Filtratablaufkanals 25 einliegt.The edge region of the base plate 3 surrounding the filtrate drain channel 25 has an annular groove 33 with a dovetail cross section, in which a sealing ring 34 for sealing the filtrate drain channel 25 lies.
In der Zwischenplatte 2 sind beidseitig ähnlich der Fixiernut 10 der Membranfilterplatten 1 ausgestaltete Nuten 35 eingelassen, in denen unter Zwischenlage des Filter- tuches 7a im Querschnitt im Wesentlichen kreisförmige Klemmleisten 36 einliegen. Das Ende des Filtertuches 7a ist zu einem Hohlsaum 37 vernäht, der die Klemmleiste 36 umfasst. Eine solche Ausgestaltung ist auch bei der Fixierleiste 14 und dem Filtertuch 7 der Membranfilterplatte 1 möglich. Die Tiefe der Nut 35, die Querschnittsabmessungen der Klemmleiste 36 und die Dicke des Filtertuches 7a sind so bemessen, dass die Au- ßenseite 38 des Filtertuches mit der von dem Randbereich 4a aufgespannten Planebene 15a fluchtet bzw. über diese im Wesentlichen nicht hinausragt. Die zur Bildung des Hohlsaumes 37 erforderliche Doppellage 39 des Filtertuchs 7a ist dabei im Bereich der Nut 35 angeordnet. In the intermediate plate 2 there are recessed grooves 35 on both sides, similar to the fixing groove 10 of the membrane filter plates 1, in which essentially circular clamping strips 36 lie in cross-section with the interposition of the filter cloth 7a. The end of the filter cloth 7a is sewn into a hemstitch 37, which includes the clamping strip 36. Such a configuration is also possible with the fixing bar 14 and the filter cloth 7 of the membrane filter plate 1. The depth of the groove 35, the cross-sectional dimensions of the clamping strip 36 and the thickness of the filter cloth 7a are dimensioned such that the outside 38 of the filter cloth is flush with the plane plane 15a spanned by the edge region 4a or does not essentially protrude beyond it. The double layer 39 of the filter cloth 7a required to form the hemstitch 37 is arranged in the region of the groove 35.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
Membranfilterplatte a MembranfilterplatteMembrane filter plate a Membrane filter plate
Zwischenplatteintermediate plate
Grundplattebaseplate
Randbereich a RandbereichBorder area a Border area
Noppeburl
Membranemembrane
Filtertuchfilter cloth
Nutgroove
Ringwulsttorus
Fixiernutfixing groove
Filterraumfilter chamber
Nutwandgroove wall
Abschnittsection
Fixierleistecleat
Planebene a PlanebenePlan level a Plan level
Wandwall
Dichtlippesealing lip
Haftflächeadhesive surface
Oberseitetop
Kantenflächeedge surface
Bohrung a BohrungHole a hole
Filtratablaufbohrungfiltrate run
Verbindungsbohrungconnecting bore
Filtratkanalfiltrate
Pfeilarrow
Druckraum Grundplattenbereichpressure chamber Base area
Dichtnutsealing groove
Dichtnutsealing groove
Dichtvorsprungsealing projection
Stütznoppesupport dimple
Pfeilarrow
Nutgroove
Dichtringseal
Nutgroove
Klemmleisteterminal block
Hohlsaumhemstitch
Außenseiteoutside
Doppellage double layer

Claims

Ansprüche Expectations
1. Membranfilterpresse mit wenigstens einer Membranfilterplatte (1 ), die eine s Grundplatte (3) mit verdicktem Randbereich (4), eine Membran (6) aus einem elastisch verformbaren Material und ein Filtertuch (7) umfasst , wobei die Membran (6) einen randständigen, in einer komplementär gestalteten Nut (8) der Grundplatte einliegenden Ringwulst (9) aufweist, gekennzeichnet durch 0 eine in der Grundplatte (3) eingelassene Dichtnut (29), die nach Art eines By- passes beidendig in die Nut (8) mündet und in der ein komplementär gestalteter, an den Ringwulst (9) angeformter Dichtvorsprung (30) formschlüssig einliegt.1. Membrane filter press with at least one membrane filter plate (1), which comprises a base plate (3) with a thickened edge region (4), a membrane (6) made of an elastically deformable material and a filter cloth (7), the membrane (6) being one has annular bead (9) lying in a complementary groove (8) in the base plate, characterized by 0, a sealing groove (29) let into the base plate (3), which ends at both ends in the manner of a bypass into the groove (8) and in which a complementary sealing projection (30) molded onto the annular bead (9) lies in a form-fitting manner.
2. Membranfilterpresse nach Anspruch 1 , s dadurch gekennzeichnet, dass in dem von der Nut (8) und der Dichtnut (29) umgrenzten Grundplattenbereich wenigstens eine Filtratablaufbohrung (23) vorhanden ist, die mit einer die Membran (6) durchsetzenden Bohrung (22) in Verbindung steht.2. membrane filter press according to claim 1, s characterized in that in the by the groove (8) and the sealing groove (29) bounded by the base plate area at least one filtrate drain hole (23) is present, which with a membrane (6) penetrating hole (22) communicates.
0 3. Membranfilterpresse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Ringwulst (9) und/oder Dichtnut (29) einen im Wesentlichen schwalbenschwanzförmigen Querschnitt aufweisen.3. Membrane filter press according to claim 1 or 2, characterized in that the annular bead (9) and / or sealing groove (29) have a substantially dovetail-shaped cross section.
5 4. Membranfilterpresse nach einem der Ansprüche 1 bis 3, gekennzeichnet durch eine in dem Ringwulst (9) angeordnete Fixiernut (10) und eine darin einliegende Fixierleiste (14), an der das Filtertuch (7) mit seinem Randbereich mittel- oder unmittelbar befestigt ist. 0 5 4. Membrane filter press according to one of claims 1 to 3, characterized by a fixing groove (10) arranged in the annular bead (9) and a fixing strip (14) therein, to which the filter cloth (7) is attached indirectly or directly with its edge region is. 0
5. Membranfilterpresse nach Anspruch 4, dadurch gekennzeichnet, dass die Fixierleiste (14) mit einem quer zur Planebene der Grundplatte (3) wirksamen Formschluss in der Fixiernut (10) einliegt.5. Membrane filter press according to claim 4, characterized in that the fixing strip (14) with a cross-section to the plane of the base plate (3) effective form fit in the fixing groove (10).
6. Membranfilterpresse nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Fixierleiste (14) kraftschlüssig in der Fixiernut (10) einliegt.6. Membrane filter press according to claim 4 or 5, characterized in that the fixing strip (14) lies non-positively in the fixing groove (10).
7. Membranfilterpresse nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Fixierleiste (14) und das Filtertuch (7) im Bereich des Ringwulstes (9) so angeordnet sind, dass sie die von dem Randbereich (4) der Grundplatte (3) aufgespannte Planebene (15) nicht überragen.7. membrane filter press according to one of claims 4 to 6, characterized in that the fixing strip (14) and the filter cloth (7) in the region of the annular bead (9) are arranged such that they from the edge region (4) of the base plate (3rd ) do not protrude over the plan level (15).
8. Membranfilterpresse nach Anspruch 4 bis 7, dadurch gekennzeichnet, dass die Fixierleiste (14) die Fixiernut (10) im Wesentlichen vollständig ausfüllt.8. membrane filter press according to claim 4 to 7, characterized in that the fixing strip (14) substantially fills the fixing groove (10).
9. Membranfilterpresse nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass der Ringwulst (9) mit einer die Fixiernut (10) umfassenden Dichtlippe (17) über die vom Grundplattenrandbereich (4) aufgespannte Planebene (15) hinaussteht.9. Membrane filter press according to one of claims 4 to 8, characterized in that the annular bead (9) with a fixing groove (10) comprising the sealing lip (17) extends beyond the plane plane (15) spanned by the base plate edge region (4).
10. Membranfilterpresse nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass das Filtertuch (7) mit seinem Rand zwischen der Fixierleiste (14) und der Fixiernut (10) eingeklemmt ist. 10. Membrane filter press according to one of claims 4 to 9, characterized in that the filter cloth (7) is clamped with its edge between the fixing strip (14) and the fixing groove (10).
11. Membranfilterpresse nach einem der Ansprüche 4 bis 10, dadurch gekennzeichnet, dass die Fixierleiste (14) in dem als Hohlsaum (37) ausgebildeten Rand des Filtertuchs (7a) einliegt.11. Membrane filter press according to one of claims 4 to 10, characterized in that the fixing strip (14) lies in the edge of the filter cloth (7a) formed as a hemstitch (37).
12. Membranfilterpresse nach einem der Ansprüche 4 bis 11 , dadurch gekennzeichnet, dass das Filtertuch (7) mit seinem Rand mit einer Haftfläche (18) der Fixierleiste (14) stoffschlüssig verbunden, insbesondere verklebt ist.12. membrane filter press according to one of claims 4 to 11, characterized in that the filter cloth (7) with its edge with an adhesive surface (18) of the fixing strip (14) is integrally connected, in particular glued.
13. Membranfilterpresse nach Anspruch 12, dadurch gekennzeichnet, dass die Haftfläche (18) parallel zur Planebene (15) verläuft und mit dem sich von ihr nach innen wegerstreckenden Bereich des Membranwulstes (9) fluchtet. 13. A membrane filter press according to claim 12, characterized in that the adhesive surface (18) runs parallel to the plane plane (15) and is aligned with the region of the membrane bead (9) extending inward therefrom.
EP03775286A 2002-11-12 2003-11-04 Membrane filter press Expired - Lifetime EP1560633B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10252922A DE10252922B3 (en) 2002-11-12 2002-11-12 Membrane filter press used in production of food, pharmaceutical products or toxic materials comprises membrane filter plate having base plate with thickened edge region, membrane and filter cloth
DE10252922 2002-11-12
PCT/EP2003/012269 WO2004043569A2 (en) 2002-11-12 2003-11-04 Membrane filter press

Publications (2)

Publication Number Publication Date
EP1560633A2 true EP1560633A2 (en) 2005-08-10
EP1560633B1 EP1560633B1 (en) 2006-09-27

Family

ID=32103448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03775286A Expired - Lifetime EP1560633B1 (en) 2002-11-12 2003-11-04 Membrane filter press

Country Status (9)

Country Link
US (1) US7326341B2 (en)
EP (1) EP1560633B1 (en)
JP (1) JP4435692B2 (en)
CN (1) CN100496666C (en)
AT (1) ATE340621T1 (en)
AU (1) AU2003283344A1 (en)
DE (2) DE10252922B3 (en)
ES (1) ES2271662T3 (en)
WO (1) WO2004043569A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112516632A (en) * 2020-11-30 2021-03-19 浙江拉罗克过滤技术有限公司 Chamber type filter plate of filter press with flow passage membrane

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015516880A (en) * 2012-04-19 2015-06-18 オウトテック （フィンランド） オサケ ユキチュアＯｕｔｏｔｅｃ （Ｆｉｎｌａｎｄ） Ｏｙ Method and apparatus for sealing a filtration chamber
DE102012209591B4 (en) * 2012-06-06 2021-03-04 Strassburger Filter Gmbh & Co. Kg Membrane plate, filter plate, filter press and using a filter press
DE202012007354U1 (en) * 2012-07-30 2013-08-01 Jvk Filtration Systems Gmbh Membrane for a membrane filter plate and arrangement of two filter plates
NL2009450C2 (en) * 2012-09-12 2014-03-18 Limburg Filter B V METHOD FOR MANUFACTURING A FILTER CLOTH FURNISHED AT LEAST.
DE202017104018U1 (en) 2017-07-05 2018-07-09 Jvk Filtration Systems Gmbh Arrangement of a filter plate and an attachment
JP6914798B2 (en) * 2017-10-06 2021-08-04 日立造船株式会社 Filter plate and filter press equipment
DE202018100564U1 (en) 2018-02-01 2019-02-04 Jvk Filtration Systems Gmbh Arrangement of a filter plate for a filter press and a sealing device and filter plate
EP4161674A4 (en) * 2020-06-03 2024-02-28 Metso Outotec Finland Oy A filter plate assembly for a horizontal plate and frame -type filter, such as a tower press, a filter plate and a vat liner
CN112807789B (en) * 2020-12-18 2022-12-13 濮琴兰 Filter plate of filter
DE202021101397U1 (en) 2021-03-18 2022-03-21 Jvk Filtration Systems Gmbh Arrangement of a filter plate for a filter press and an insert and ring-shaped insert for a filter plate

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3209341A1 (en) * 1982-03-15 1983-09-15 H. Putsch Gmbh & Co, 5800 Hagen Filter press
DE3220487C2 (en) * 1982-05-29 1985-01-31 Lenser Kunststoff-Presswerk Gmbh + Co Kg, 7913 Senden Filter plate
EP0155458B1 (en) * 1984-01-31 1990-04-11 JVK Filtration Systems GmbH Membrane filter plate
DE3617651C2 (en) * 1986-05-26 1994-08-04 Jv Kunststoffwerk Filter press
DE8811071U1 (en) * 1988-09-01 1988-11-10 JV Kunststoffwerk GmbH, 8544 Georgensgmünd Membrane filter plate for filter presses
CN2063434U (en) * 1990-03-17 1990-10-10 吉林省扶余市橡胶制品厂 Box type rubber diaphragm pressing filter-plate
CN2149240Y (en) * 1992-12-01 1993-12-15 河北省武强县压滤机板框厂 Rubber composition sheet type plate of filter press
DE4415274C2 (en) * 1994-04-30 1998-04-30 Jv Kunststoffwerk Filter plate for a plate filter press
DE4419865C1 (en) 1994-06-07 1995-06-08 Lenser Kunststoff Preswerk Gmb Filter plate assembly with membrane locking rim narrower than receiving keyway
DE19636436C2 (en) * 1996-09-07 1998-10-15 Hoesch & Soehne Eberhard Press membrane for a membrane plate of a plate filter press
FR2754758B1 (en) * 1996-10-18 1999-01-08 Hubert Bernard Louis Felicien PRESS TO FILTER
US6180002B1 (en) * 1998-08-03 2001-01-30 United States Filter Corporation Filter press with alternating diaphragm squeeze chamber plates and filtration chamber plates
DE19843028A1 (en) * 1998-08-26 2000-03-02 Lenser Filtration Gmbh & Co Drying system for accumulated filter cakes in a filter press has heat applied directly to the side of the filter cake away from the membrane to form a vapor layer to press out retained fluid under vacuum
US6387282B1 (en) * 1998-08-26 2002-05-14 Lenser Filtration Gmbh & Co. Method of drying a filter cake and a press for carrying out the method
CN2339281Y (en) * 1998-09-30 1999-09-22 朱兴源 Mosaic connected diaphragm filter plate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004043569A2 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112516632A (en) * 2020-11-30 2021-03-19 浙江拉罗克过滤技术有限公司 Chamber type filter plate of filter press with flow passage membrane

Also Published As

Publication number Publication date
JP2006505398A (en) 2006-02-16
JP4435692B2 (en) 2010-03-24
WO2004043569A2 (en) 2004-05-27
EP1560633B1 (en) 2006-09-27
WO2004043569A3 (en) 2004-07-22
US20050247616A1 (en) 2005-11-10
DE50305201D1 (en) 2006-11-09
ES2271662T3 (en) 2007-04-16
US7326341B2 (en) 2008-02-05
CN100496666C (en) 2009-06-10
AU2003283344A1 (en) 2004-06-03
CN1711122A (en) 2005-12-21
ATE340621T1 (en) 2006-10-15
DE10252922B3 (en) 2004-05-13

Similar Documents

Publication Publication Date Title
DE3220487C2 (en) Filter plate
DE2322044C2 (en) Press membrane for membrane plates
DE102012209591B4 (en) Membrane plate, filter plate, filter press and using a filter press
DE10221061B4 (en) Membrane, membrane plate and plate pack for a filter press
DE2460411C3 (en) Filter plate
DE1960821C3 (en) Membrane plate for plate filter presses
DE10252922B3 (en) Membrane filter press used in production of food, pharmaceutical products or toxic materials comprises membrane filter plate having base plate with thickened edge region, membrane and filter cloth
EP0556186B1 (en) Membrane plate for plate filter presses
DE4119166C2 (en) Filter element for a filter press
DE3240953A1 (en) FILTER PLATES / MEMBRANE STRUCTURE FOR A FILTER PRESS
EP0357015B1 (en) Membrane filter press plate for filter presses
DE3233126A1 (en) EXPRESSION PLATE ARRANGEMENT FOR FILTER PRESSES
CH626265A5 (en)
DE102017207484A1 (en) Plate for a filter press, filter press, use of the filter press and method for cleaning the filter press
DE3639894C2 (en)
EP2427252B1 (en) Membrane carrier for a filter press
DE10024725C2 (en) Membrane filter plate for a filter press and carrier plate and membrane for such a membrane filter plate
DE19602977C1 (en) Membrane filter plate for a filter press
EP0211315A2 (en) Chamber filter press
DE3836729A1 (en) Membrane filter plate and method of fastening the membranes
EP1159997B1 (en) Membrane filter plate for a filter press and also a supporting plate and membrane for this membrane filter plate
EP1078672B1 (en) Filter press with membrane filter elements
DE3502228C2 (en)
DE7316450U (en) PRESS DIAPHRAGM FOR PLATE FILTER PRESSES
DE20321566U1 (en) Plate package for a filter press

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050603

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060927

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50305201

Country of ref document: DE

Date of ref document: 20061109

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061227

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061227

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061227

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20061213

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070313

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2271662

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070628

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: JVK FILTRATION SYSTEMS GMBH

Free format text: JVK FILTRATION SYSTEMS GMBH#OBERE LERCH 2#91166 GEORGENSGMUEND (DE) -TRANSFER TO- JVK FILTRATION SYSTEMS GMBH#OBERE LERCH 2#91166 GEORGENSGMUEND (DE)

BERE Be: lapsed

Owner name: JVK FILTRATION SYSTEMS G.M.B.H.

Effective date: 20061130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061104

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060927

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50305201

Country of ref document: DE

Representative=s name: TERGAU & WALKENHORST PATENT- UND RECHTSANWAELT, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 50305201

Country of ref document: DE

Representative=s name: TERGAU & WALKENHORST PATENTANWAELTE PARTGMBB, DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20191119

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20191216

Year of fee payment: 17

Ref country code: FR

Payment date: 20191121

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20191125

Year of fee payment: 17

Ref country code: AT

Payment date: 20191119

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20191126

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20201126

Year of fee payment: 18

REG Reference to a national code

Ref country code: FI

Ref legal event code: MAE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 340621

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201104

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201130

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201104

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201104

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20220131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201105

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50305201

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220601